expand_float_replicate
Tcl_Obj* imageObj
int ww
int hn
int we
int hs
/*
* Border expansion by extending the edges, i.e. replicating the border
* pixels.
*/
crimp_image* image;
crimp_input (imageObj, image, float);
/*
* This is the simple definition. Might be better to generate macros
* specialized to each quadrant. Except, even they have to perform modulo
* arithmetic, as the border may be larger than image's width or height,
* causing muliple wrapping.
*/
#define FILL(xo,yo) { \
int xi = xo - ww; \
int yi = yo - hn; \
if (xi < 0) { xi = 0; } \
else if (xi >= image->w) { xi = (image->w-1); } \
\
if (yi < 0) { yi = 0; } \
else if (yi >= image->h) { yi = (image->h-1); } \
\
FLOATP (result, xo, yo) = FLOATP (image, xi, yi); \
}
#define COPY(xo,yo,xi,yi) { \
FLOATP (result, xo, yo) = FLOATP (image, xi, yi); \
}
#include <expand_op.c>
/* vim: set sts=4 sw=4 tw=80 et ft=c: */
/*
* Local Variables:
* mode: c
* c-basic-offset: 4
* fill-column: 78
* End:
*/